SCHEDULE I CONDENSED FINANCIAL INFORMATION OF REGISTRANT - STATEMENTS OF FINANCIAL POSITION (Parenthetical) (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Condensed Balance Sheet Statements, Captions [Line Items]
Accumulated depreciation and amortization	$ 55,304,631	$ 50,116,238
Preferred stock, par value (in dollars per share)	$ 100	$ 100
Preferred stock, shares outstanding (in shares)	0	0
Preferred Stock, Shares Issued	0	0
Preferred stock, shares authorized (in shares)	6,000	6,000
Common stock, shares outstanding (in shares)	170,000	170,000
Voting Common Stock
Condensed Balance Sheet Statements, Captions [Line Items]
Common stock, shares authorized (in shares)	2,000	2,000
Common stock, shares issued (in shares)	1,700	1,700
Common stock, shares outstanding (in shares)	1,700	1,700
Common stock, par value (in dollars per share)	$ 100	$ 100
Nonvoting Common Stock
Condensed Balance Sheet Statements, Captions [Line Items]
Common stock, shares authorized (in shares)	198,000	198,000
Common stock, shares issued (in shares)	168,300	168,300
Common stock, shares outstanding (in shares)	168,300	168,300
Common stock, par value (in dollars per share)	$ 0	$ 0